Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (4): 34-41.doi: 10.19964/j.issn.1006-4990.2023-0277

• Research & Development • Previous Articles     Next Articles

Treatment effect and flocculation mechanism of abandoned drilling mud by different flocculants

YANG Bin1(), LI Yinyue2, DONG Mingkun2, HAN Ximeng2, GUI Xin2, ZHANG Fawen2()   

  1. 1.Zhengzhou Ecological Environment Monitoring Center, Zhengzhou 450007, China
    2.College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2023-05-19 Online:2024-04-10 Published:2024-04-18
  • Contact: ZHANG Fawen E-mail:12639479@qq.com;zhangfawen@henau.edu.cn

Abstract:

In order to reveal the flocculation effect of different flocculants on abandoned drilling mud,the method of breaking flocculation was used to treat the abandoned coalbed methane drilling mud with high water content and complex composition,which was taken from Shanxi Province.The effect of flocculant type,flocculant amount,and other factors on the flocculation performance of the abandoned drilling mud was analyzed.The flocculation mechanism was explored by scanning electron microscopy(SEM).The results showed that the dosage of aluminum sulfate with 2 000 mg/L had the best flocculation effect,and the dosage of non-ionic polyacrylamide(NPAM) with 10 mg/L had the best co-treatment effect.The liquid phase chromaticity,CODCr,suspended matter content and water content of mud cake after treatment were 20 times,61.98,32.50 mg/L and 78.64% respectively.The electric neutralization of aluminum sulfate could produce good synergistic effect with the bridge trapping of NPAM,which could significantly accelerate the flocculation settlement of particles in the mud,increasing the volume of volume of flocculation and the degree of porosity,so as to reduce the content of pollutants in liquid phase and the moisture content of mud cake.The results of this study could provide useful guidance and theoretical basis for the flocculation treatment of waste drilling mud.

Key words: waste mud, flocculation, collaborative processing, organic coagulant aid

CLC Number: